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/*
strbuf.h - a string buffer
Copyright (C) 2010 Red Hat, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef BTPARSER_STRBUF_H
#define BTPARSER_STRBUF_H
#ifdef __cplusplus
extern "C" {
#endif
struct btp_strbuf
{
/**
* Size of the allocated buffer. Always > 0.
*/
int alloc;
/**
* Length of the string, without the ending \0.
*/
int len;
char *buf;
};
/**
* Creates and initializes a new string buffer.
* @returns
* It never returns NULL. The returned pointer must be released by
* calling the function btp_strbuf_free().
*/
struct btp_strbuf *
btp_strbuf_new();
/**
* Releases the memory held by the string buffer.
* @param strbuf
* If the strbuf is NULL, no operation is performed.
*/
void
btp_strbuf_free(struct btp_strbuf *strbuf);
/**
* Releases the strbuf, but not the internal buffer. The internal
* string buffer is returned. Caller is responsible to release the
* returned memory using free().
*/
char *
btp_strbuf_free_nobuf(struct btp_strbuf *strbuf);
/**
* The string content is set to an empty string, erasing any previous
* content and leaving its length at 0 characters.
*/
void
btp_strbuf_clear(struct btp_strbuf *strbuf);
/**
* Ensures that the buffer can be extended by num characters
* without dealing with malloc/realloc.
*/
void
btp_strbuf_grow(struct btp_strbuf *strbuf, int num);
/**
* The current content of the string buffer is extended by adding a
* character c at its end.
*/
struct btp_strbuf *
btp_strbuf_append_char(struct btp_strbuf *strbuf,
char c);
/**
* The current content of the string buffer is extended by adding a
* string str at its end.
*/
struct btp_strbuf *
btp_strbuf_append_str(struct btp_strbuf *strbuf,
const char *str);
/**
* The current content of the string buffer is extended by inserting a
* string str at its beginning.
*/
struct btp_strbuf *
btp_strbuf_prepend_str(struct btp_strbuf *strbuf,
const char *str);
/**
* The current content of the string buffer is extended by adding a
* sequence of data formatted as the format argument specifies.
*/
struct btp_strbuf *
btp_strbuf_append_strf(struct btp_strbuf *strbuf,
const char *format, ...);
/**
* The current content of the string buffer is extended by inserting a
* sequence of data formatted as the format argument specifies at the
* buffer beginning.
*/
struct btp_strbuf *
btp_strbuf_prepend_strf(struct btp_strbuf *strbuf,
const char *format, ...);
#ifdef __cplusplus
}
#endif
#endif
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